LED lamp power utilization monitoring device based on carrier communication

Abstract

The utility model aims to provide the power utilization monitoring device for the LED lamp based on carrier communication, which is simple in structure and low in cost. In the utility model, the input end of an LED power supply is respectively connected with an EMI circuit (1) and an HPLC module circuit (9), the output end of the EMI circuit is connected with the input end of a lightning protection circuit (2), the output end of the lightning protection circuit is connected with the input end of a rectification filter circuit (3), the output end of the rectification filter circuit is connected with the input end of a PFC circuit (4), and the output end of the PFC circuit is connected with the input end of a switch conversion circuit (5). The PWM control circuit (6) is respectively connected with the PFC circuit and the switch conversion circuit, the output end of the switch conversion circuit is connected with the input end of a secondary rectification filter circuit (7), the output end of the secondary rectification filter circuit is connected with an output circuit (8), the output circuit is connected with an LED lamp source, and the output end of the HPLC module circuit is communicated with a system background. The utility model relates to the field of power management.

Description

Technical Field

[0001] The utility model relates to the field of power management, and in particular to a power consumption monitoring device for LED lamps based on carrier communication. Background Art

[0002] With economic development, domestic transportation has become increasingly convenient, greatly facilitating travel. On non-highway roads, streetlights are typically installed in large numbers along the road to address road lighting issues. Currently, electricity consumption for highway lighting is typically measured by installing a meter within a designated road section. However, with the power industry's demand for more refined management, detailed energy metering for each streetlight is required. Some suggest installing a meter with remote communication capabilities on each streetlight to calculate its power consumption and upload it to a central control system. However, this approach clearly incurs significant costs, which falls short of the industry's low-cost requirements. Therefore, a power consumption monitoring device is needed that can calculate the power consumption of each streetlight while maintaining a low cost. Utility Model Content

[0003] In view of the deficiencies in the prior art, the present invention proposes a simple-structured, low-cost LED lamp power monitoring device based on carrier communication.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a LED lamp power monitoring device based on carrier communication, the monitoring device includes

[0005] EMI circuit used to connect to the grid AC input and filter the input.

[0006] Lightning protection circuit to prevent surge voltage from damaging monitoring devices,

[0007] Rectifier filter circuit for rectifying and filtering AC input.

[0008] PFC circuit used to correct power factor and boost voltage to high voltage DC.

[0009] A switching circuit used to convert high-voltage DC into high-frequency low-voltage.

[0010] a PWM control circuit for controlling the PFC circuit and the switching conversion circuit,

[0011] Secondary rectifier and filter circuit for rectifying and filtering high frequency and low voltage.

[0012] Output circuit for DC output and dimming control, and

[0013] HPLC module circuit used to upload the collected LED light power consumption information and location information to the system background;

[0014] The LED power supply input end is respectively connected to the EMI circuit and the HPLC module circuit, the output end of the EMI circuit is connected to the input end of the lightning protection circuit, the output end of the lightning protection circuit is connected to the input end of the rectifier and filter circuit, the output end of the rectifier and filter circuit is connected to the input end of the PFC circuit, the output end of the PFC circuit is connected to the input end of the switch conversion circuit, the PWM control circuit is respectively connected to the PFC circuit and the switch conversion circuit, the output end of the switch conversion circuit is connected to the input end of the secondary rectifier and filter circuit, the output end of the secondary rectifier and filter circuit is connected to the output circuit, the output circuit is connected to the LED light source, and the output end of the HPLC module circuit communicates with the system background.

[0015] Specifically:

[0016] The EMI circuit consists of a first common-mode inductor, a second common-mode inductor, and two energy storage capacitors.

[0017] The rectification and filtering circuit consists of a rectifier bridge, a first capacitor, a second capacitor and a first inductor.

[0018] The PFC circuit includes a second transformer and a first MOS transistor, and the PFC circuit is connected to the PWM control circuit through the first MOS transistor.

[0019] The switch conversion circuit includes a high-frequency transformer and a second MOS transistor, and the switch conversion circuit is connected to the PWM control circuit through the second MOS transistor.

[0020] The PWM control circuit uses an AC-DC control regulator of model LD7791 to provide control signals for the PFC circuit and the switching conversion circuit.

[0021] The secondary rectification and filtering circuit is composed of an RC circuit.

[0022] The output circuit uses a constant voltage and constant current controller of model LD8115A to perform DC output and LED dimming control.

[0023] The HPLC module circuit includes an X capacitor, an isolation sampling transformer and a programmable logic controller. The X capacitor, the isolation sampling transformer and the programmable logic controller are connected in sequence. The isolation sampling transformer is connected to the LED power input terminal.

[0024] The beneficial effects of the present invention are as follows: in the present invention, through the EMI circuit, lightning protection circuit, rectifier and filter circuit, PFC circuit, switch conversion circuit, PWM control circuit, secondary rectifier and filter circuit and output circuit, it is possible to take power from the power grid and provide stable and reliable electric energy for the LED lamp. In addition, by arranging an HPLC module circuit at the input end of the LED power supply and utilizing the carrier function of the HPLC module circuit, communication between the power line and the system background is realized. Through the address determined by the LED light source of each lamp pole, the system background reads the power consumption of each LED street lamp. The system background can directly read the meter without manual meter reading, thereby realizing signal transmission and information acquisition between the system background and the LED light source on each street lamp pole. Compared with the existing technology, the cost is greatly reduced and the structure is simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a principle block diagram of the utility model;

[0026] Figure 2 It is a circuit principle diagram of the utility model;

[0027] Figure 3 is the schematic diagram of the HPLC module circuit. DETAILED DESCRIPTION

[0028] like Figures 1 to 3 As shown, the utility model includes

[0029] EMI circuit 1 used to connect to the AC input of the power grid and filter the input.

[0030] Lightning protection circuit 2 for preventing surge voltage from damaging monitoring device,

[0031] Rectifier filter circuit 3 for rectifying and filtering AC input.

[0032] PFC circuit 4 is used to correct the power factor and increase the voltage to high voltage DC.

[0033] Switching circuit 5 for converting high voltage DC into high frequency low voltage,

[0034] a PWM control circuit 6 for controlling the PFC circuit 4 and the switching conversion circuit 5,

[0035] Secondary rectifier and filter circuit 7 for rectifying and filtering high frequency and low voltage,

[0036] Output circuit 8 for DC output and dimming control, and

[0037] HPLC module circuit 9 is used to upload the collected LED lamp power consumption information and location information to the system background.

[0038] The LED power supply input end 10 is respectively connected to the EMI circuit 1 and the HPLC module circuit 9, the output end of the EMI circuit 1 is connected to the input end of the lightning protection circuit 2, the output end of the lightning protection circuit 2 is connected to the input end of the rectifier and filter circuit 3, the output end of the rectifier and filter circuit 3 is connected to the input end of the PFC circuit 4, the output end of the PFC circuit 4 is connected to the input end of the switch conversion circuit 5, the PWM control circuit 6 is respectively connected to the PFC circuit 4 and the switch conversion circuit 5, the output end of the switch conversion circuit 5 is connected to the input end of the secondary rectifier and filter circuit 7, the output end of the secondary rectifier and filter circuit 7 is connected to the output circuit 8, the output circuit 8 is connected to the LED light source, and the output end of the HPLC module circuit 9 communicates with the system background.

[0039] Specifically, the EMI circuit 1 consists of a first common-mode inductor LF1, a second common-mode inductor LF2, and two energy storage capacitors. The rectifier and filter circuit 3 consists of a rectifier bridge BD1, a first capacitor C1, a second capacitor C2, and a first inductor L1. The PFC circuit 4 includes a second transformer L2 and a first MOS transistor Q1, which is connected to the PWM control circuit 6 via the first MOS transistor Q1. The switching converter circuit 5 includes a high-frequency transformer TIA and a second MOS transistor Q2, which is connected to the PWM control circuit 6 via the second MOS transistor Q2. The PWM control circuit 6 uses an LD7791 AC-DC control regulator US1 to provide control signals to the PFC circuit 4 and the switching converter circuit 5. The secondary rectifier and filter circuit 7 consists of an RC circuit. The output circuit 8 uses an LD8115A constant voltage and constant current controller for DC output and LED dimming control. The HPLC module circuit 9 includes an X capacitor CX2, an isolation sampling transformer TR2 and a programmable logic controller U2. The X capacitor CX2, the isolation sampling transformer TR2 and the programmable logic controller U2 are connected in sequence. The X capacitor CX2 and the isolation sampling transformer TR2 are respectively connected to the LED power input terminal 10.

[0040] The workflow of this utility model is as follows:

[0041] The LED power input terminal 10 is connected to the AC power grid. The AC power passes through the EMI circuit 1 (which performs filtering to prevent the power grid from affecting the monitoring device and the monitoring device from polluting the power grid). The EMI circuit 1 is connected to the lightning protection circuit 2 (the lightning protection circuit can prevent surge voltage from damaging the power supply device). The lightning protection circuit 2 is connected to the rectifier and filter circuit 3 (the rectifier and filter circuit rectifies and filters the AC power). The rectifier and filter circuit 3 is connected to the PFC circuit 4 (the PFC circuit is used to correct the power factor and increase the voltage to high-voltage DC). The PFC circuit 4 is connected to the switching converter circuit 5 (the switching converter circuit converts the high-voltage DC into high-frequency and low-voltage). The PWM control circuit 6 is respectively connected to the PFC circuit 4 and the switching converter circuit 5 (the PWM control circuit controls the output of the PFC circuit and the switching converter circuit by controlling the duty cycle). The switching converter circuit 5 is connected to the secondary rectifier and filter circuit 7 (the secondary rectifier and filter circuit rectifies and filters the high-frequency and low-voltage). The secondary rectifier and filter circuit 7 is connected to the output circuit 8 (the output circuit implements DC output and dimming control). The HPLC module circuit 9 is connected to the input terminal 10 of the LED power supply device (the HPLC module circuit collects the power consumption information and position information of the LED lamp on each lamp pole, and uploads it to the system background through serial communication to measure the power of each lamp pole).

[0042] The utility model adds an HPLC module circuit and utilizes its characteristic of being able to realize communication through carrier wave on the power line. It takes LED lights with unique addresses on the road as objects and combines the monitoring function of the system background to realize signal transmission and information acquisition, and finally realizes the monitoring of LED power consumption and background meter reading.

[0043] The above description is only the optimal solution embodiment of the present invention and is not intended to limit the present invention. Various modifications or replacements of the present invention made by those skilled in the art without departing from the essence and protection scope of the present invention should also be within the scope of protection of the present invention.

Claims

1. A LED lamp power consumption monitoring device based on carrier communication, characterized by: The monitoring device includes EMI circuit for connecting to the AC input of the power grid and filtering the input (1), Lightning protection circuit (2) to prevent surge voltage from damaging the monitoring device, A rectifier filter circuit (3) for electrically rectifying and filtering AC input. PFC circuit (4) is used to correct the power factor and increase the voltage to high voltage DC. A switching circuit (5) for converting high-voltage direct current into high-frequency low-voltage. a PWM control circuit (6) for controlling the PFC circuit (4) and the switching conversion circuit (5), A secondary rectifier filter circuit (7) for rectifying and filtering high-frequency low voltage. an output circuit (8) for DC output and dimming control, and HPLC module circuit (9) for uploading the collected LED lamp power consumption information and location information to the system background; The LED power supply input end (10) is connected to the EMI circuit (1) and the HPLC module circuit (9) respectively; the output end of the EMI circuit (1) is connected to the input end of the lightning protection circuit (2); the output end of the lightning protection circuit (2) is connected to the input end of the rectifier filter circuit (3); the output end of the rectifier filter circuit (3) is connected to the input end of the PFC circuit (4); the output end of the PFC circuit (4) is connected to the input end of the switch conversion circuit (5); the PWM control circuit (6) is connected to the PFC circuit (4) and the switch conversion circuit (5) respectively; the output end of the switch conversion circuit (5) is connected to the input end of the secondary rectifier filter circuit (7); the output end of the secondary rectifier filter circuit (7) is connected to the output circuit (8); the output circuit (8) is connected to the LED light source; the output end of the HPLC module circuit (9) communicates with the system background.

2. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The EMI circuit (1) consists of a first common-mode inductor (LF1), a second common-mode inductor (LF2) and two energy storage capacitors.

3. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The rectifier and filter circuit (3) is composed of a rectifier bridge (BD1), a first capacitor (C1), a second capacitor (C2), and a first inductor (L1).

4. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The PFC circuit (4) comprises a second transformer (L2) and a first MOS transistor (Q1), and the PFC circuit (4) is connected to the PWM control circuit (6) via the first MOS transistor (Q1).

5. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The switch conversion circuit (5) comprises a high-frequency transformer (TIA) and a second MOS tube (Q2), and the switch conversion circuit (5) is connected to the PWM control circuit (6) via the second MOS tube (Q2).

6. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The PWM control circuit (6) is provided with a control signal for the PFC circuit (4) and the switch conversion circuit (5) by an AC-DC control regulator (US1) of model LD7791.

7. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The secondary rectifier filter circuit (7) is composed of an RC circuit.

8. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The output circuit (8) uses a constant voltage and constant current controller of model LD8115A to perform DC output and LED dimming control.

9. The LED lamp power consumption monitoring device based on carrier communication according to claim 1, characterized in that: The HPLC module circuit (9) comprises an X capacitor (CX2), an isolation sampling transformer (TR2) and a programmable logic controller (U2), wherein the X capacitor (CX2), the isolation sampling transformer (TR2) and the programmable logic controller (U2) are connected in sequence, and the isolation sampling transformer (TR2) is connected to the LED power input terminal (10).

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